4 x 100 SDK on back w/ short fins @ 1:35 - made these no problem
4 x 100 SDK on back w/ short fins @ 1:25 - no problem here either, was under 1:15s
4 x 100 SDK on back w/ short fins @ 1:15!!! - made the first one by 2 seconds, then it was all over...ended up going on the 1:20 interval though